diff --git a/target/linux/realtek/patches-6.6/704-include-linux-phy-increase-phy-address-number-for-rtl839x.patch b/target/linux/realtek/patches-6.6/704-include-linux-phy-increase-phy-address-number-for-rtl839x.patch
new file mode 100644
index 00000000000..9a6b00d7c0e
--- /dev/null
+++ b/target/linux/realtek/patches-6.6/704-include-linux-phy-increase-phy-address-number-for-rtl839x.patch
@@ -0,0 +1,32 @@
+From 2b88563ee5aafd9571d965b7f2093a0f58d98a31 Mon Sep 17 00:00:00 2001
+From: John Crispin <john@phrozen.org>
+Date: Thu, 26 Nov 2020 12:02:21 +0100
+Subject: PHY: Increase max PHY adddress number
+
+* rename the target to realtek
+* add refactored DSA driver
+* add latest gpio driver
+* lots of arch cleanups
+* new irq driver
+* additional boards
+
+Submitted-by: Bert Vermeulen <bert@biot.com>
+Submitted-by: Birger Koblitz <mail@birger-koblitz.de>
+Submitted-by: Sander Vanheule <sander@svanheule.net>
+Submitted-by: Bjørn Mork <bjorn@mork.no>
+Submitted-by: John Crispin <john@phrozen.org>
+---
+ include/linux/phy.h                           | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/include/linux/phy.h
++++ b/include/linux/phy.h
+@@ -287,7 +287,7 @@ static inline const char *phy_modes(phy_
+ #define PHY_INIT_TIMEOUT	100000
+ #define PHY_FORCE_TIMEOUT	10
+ 
+-#define PHY_MAX_ADDR	32
++#define PHY_MAX_ADDR	64
+ 
+ /* Used when trying to connect to a specific phy (mii bus id:phy device id) */
+ #define PHY_ID_FMT "%s:%02x"